# OC Root 2nd 3rd 4th PC Gene/Definition OC.275391 Archaea.8305 Euryarchaeota.63967 Thermoplasma.1125 tac.977 tac:Ta1001 probable fumarate reductase (frdA); K00239 succinate dehydrogenase / fumarate reductase, flavoprotein subunit [EC:1.3.5.1 1.3.5.4] OC.275391 Archaea.8305 Euryarchaeota.63967 Thermoplasma.1125 tvo.763 tvo:TVG0761794 TVG0761794; succinate dehydrogenase flavoprotein; K00239 succinate dehydrogenase / fumarate reductase, flavoprotein subunit [EC:1.3.5.1 1.3.5.4]